Patent application number | Description | Published |
20080241655 | ELECTRODE AND ELECTROCHEMICAL DEVICE - An electrode is provided as one capable of achieving further improvement in safety of an electrochemical device when exposed to a high-temperature environment, and an electrochemical device is provided as one using the electrode. The electrode has a current collector, an endothermic material layer provided on the current collector, and an active material layer provided on the endothermic material layer. The endothermic material layer contains an endothermic material absorbing heat at 80° C. or higher in a differential scanning calorimetry curve thereof. | 10-02-2008 |
20080241685 | ANODE AND LITHIUM-ION SECONDARY BATTERY - An anode for lithium-ion secondary battery is provided as one capable of ensuring sufficient safety (suppression of dendrites) while achieving a higher capacity (higher density of the electrode), and permitting formation of a lithium-ion secondary battery with excellent high-rate discharge performance. An anode for lithium-ion secondary battery has a current collector, and an active material-containing layer formed on the current collector, the active material-containing layer is comprised of an outermost layer disposed on the farthest side from the current collector, and a lower layer composed of at least one layer disposed between the outermost layer and the current collector, and a degree of flexion of the outermost layer is smaller than that of the lower layer. | 10-02-2008 |
20080241696 | ELECTRODE AND ELECTROCHEMICAL DEVICE - An electrode is provided as one capable of adequately maintaining voids in a surface layer and an electrochemical device is provided as one using the electrode. The electrode has a current collector, and an active material-containing layer provided on the current collector and containing active material particles, the number of peaks in a particle size distribution of the active material particles in a lower part on the current collector side in the active material-containing layer is larger than the number of peaks in a particle size distribution of the active material particles in a surface part on the opposite side to the current collector in the active material-containing layer, and a thickness of the lower part is not less than 50% nor more than 90% of a total thickness of the surface part and the lower part. | 10-02-2008 |
20080248387 | ANODE AND LITHIUM-ION SECONDARY BATTERY - An anode is provided as one capable of suppressing rapid entrance/exit of lithium ions during quick charge-discharge and ensuring sufficient safety in use as an anode of a lithium-ion secondary battery. The anode is an anode for lithium-ion secondary battery having a current collector, and an active material-containing layer formed on the current collector, wherein the active material-containing layer is comprised of an outermost layer disposed on the farthest side from the current collector, and a lower layer composed of at least one layer disposed between the outermost layer and the current collector, and wherein a degree of flexion of the outermost layer is larger than a degree of flexion of the lower layer. | 10-09-2008 |
20080295765 | LIQUID APPLICATOR - A liquid applicator comprises a guide roll for guiding a sheet, and a slit die, having a slit with an opening extending in an axial direction of the guide roll, for applying a liquid to a surface of the sheet guided by the guide roll. On the rear side of the opening in a rotating direction of the guide roll, the slit die further includes a front lip having a concave surface corresponding to the guide roll. The front lip opposes the guide roll by such a length FA in the rotating direction RD of the guide roll as to have a central angle θ of 0.95° to 3.0° about an axis O of the guide roll. | 12-04-2008 |
20080311476 | ELECTRODE AND ELECTROCHEMICAL DEVICE - An electrode has a current collector, and an active material-containing layer provided on the current collector and containing active material particles and ceramic particles, and a weight concentration of the ceramic particles to the active material particles in a surface part in the active material-containing layer on the opposite side to the current collector is higher than a weight concentration of the ceramic particles to the active material particles in a lower part in the active material-containing layer on the current collector side. Furthermore, the thickness of the surface part is not less than 30% nor more than 60% of the total thickness of the surface part and the lower part. | 12-18-2008 |
20080318130 | ELECTRODE AND LITHIUM-ION SECONDARY BATTERY - An electrode is provided as one that can suppress generation of hydrogen and that has sufficiently low impedance. The electrode has an aluminum current collector, an aluminum hydroxide layer provided on the aluminum current collector, and an active material layer containing lithium-containing metal oxide and provided on the aluminum hydroxide layer. The thickness of the aluminum hydroxide layer is not more than 50 nm. | 12-25-2008 |
20100078591 | ACTIVE MATERIAL AND METHOD OF MANUFACTURING ACTIVE MATERIAL - An active material capable of forming an electrochemical device excellent in its discharge capacity and rate characteristic is provided. The active material in accordance with a first aspect of the present invention comprises a compound particle containing a compound having a composition represented by the following chemical formula (1), a carbon layer covering the compound particle, and a carbon particle. The active material in accordance with a second aspect of the present invention comprises a carbon particle and a compound particle having an average primary particle size of 0.03 to 1.4 μm, being carried by the carbon particle, and containing a compound represented by the following chemical formula (1): | 04-01-2010 |
20100081058 | ACTIVE MATERIAL AND POSITIVE ELECTRODE AND LITHIUM-ION SECOND BATTERY USING SAME - An active material contains a triclinic LiVOPO | 04-01-2010 |
20100167125 | METHOD OF MANUFACTURING LITHIUM-ION SECONDARY BATTERY POSITIVE ELECTRODE, METHOD OF MANUFACTURING LITHIUM-ION SECONDARY BATTERY, LITHIUM-ION SECONDARY BATTERY POSITIVE ELECTRODE, AND LITHIUM-ION SECONDARY BATTERY - A method of manufacturing a lithium-ion secondary battery positive electrode comprises a coating material preparing step of preparing a positive electrode active material layer forming coating material by mixing a positive electrode active material, a binder, a conductive auxiliary, an organic solvent, and water; and an active material layer forming step of forming a positive electrode active material layer on a current collector by using the positive electrode active material layer forming coating material. The binder is polyvinylidene fluoride produced by emulsion polymerization. The positive electrode active material layer forming coating material is prepared in the coating material preparing step such that the amount of water added (% by mass) based on the total amount of the organic solvent and water and the pH of the positive electrode active material satisfy the following expression (1): | 07-01-2010 |
20100233058 | METHOD OF MANUFACTURING ACTIVE MATERIAL - The present invention provides a method of manufacturing an active material which can form an electrochemical device excellent in discharge capacity. The method of manufacturing an active material in accordance with the present invention comprises a hydrothermal synthesis step of heating a mixture including a lithium compound, a metal compound containing one species selected from the group consisting of Fe, Mn, Co, Ni, and V, a phosphorus compound, and water within a reactor while keeping an internal pressure of the reactor at 0.3 MPa or lower by ventilating the inside of the reactor to the outside, and closing the reactor at a time when the temperature of the mixture reaches 100 to 150° C.; and a firing step of firing the mixture after the hydrothermal synthesis step. | 09-16-2010 |
20100233544 | METHOD OF MANUFACTURING ACTIVE MATERIAL, ACTIVE MATERIAL, ELECTRODE, AND LITHIUM-ION SECONDARY BATTERY - The present invention provides a method of manufacturing an active material comprising both α-LiVOPO | 09-16-2010 |
20100233545 | ACTIVE MATERIAL, METHOD OF MANUFACTURING ACTIVE MATERIAL, ELECTRODE, AND LITHIUM-ION SECONDARY BATTERY - The first aspect of the invention provides a method of manufacturing an active material capable of selectively synthesizing β-LiVOPO | 09-16-2010 |
20130071743 | METHOD OF MANUFACTURING LITHIUM-ION SECONDARY BATTERY POSITIVE ELECTRODE, METHOD OF MANUFACTURING LITHIUM-ION SECONDARY BATTERY, LITHIUM-ION SECONDARY BATTERY POSITIVE ELECTRODE, AND LITHIUM-ION SECONDARY BATTERY - A method of manufacturing a lithium-ion secondary battery positive electrode comprises a coating material preparing step of preparing a positive electrode active material layer forming coating material by mixing a positive electrode active material, a binder, a conductive auxiliary, an organic solvent, and water; and an active material layer forming step of forming a positive electrode active material layer on a current collector by using the positive electrode active material layer forming coating material. The binder is polyvinylidene fluoride produced by emulsion polymerization. The positive electrode active material layer forming coating material is prepared in the coating material preparing step such that the amount of water added (% by mass) based on the total amount of the organic solvent and water and the pH of the positive electrode active material satisfy the following expression (1): | 03-21-2013 |